Like all buying decisions, price is always the deciding factor and here, Micromax is ahead by a mile. With a price difference of nearly Rs.6,000, which is a lot, the Canvas HD A116 makes a much better purchase overall. It has a denser and better looking display, scores well in terms of build and finish, has the latest Android flavour, very good multimedia capabilities, good front and rear camera, powerful processor and, to top it all off, has very decent battery life. The only major things going against the Canvas HD are the lack of timely updates (if any) and the fact that you can't use it anywhere in the world if you travel a lot. Samsung takes care of these shortcomings in the Grand Duos, but we feel the premium is not worth paying since the rest of the feature simply don't match and are rather inferior to the Canvas HD. Also, once we start getting custom ROMs from the good folks at XDA, it's not going to be so much of a problem.
If you are still scratching your head about which one to pick, we recommend the Canvas HD over the Galaxy Grand.